<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
<!-- <form action="">
    <input type="button" value="Input Button"/>
    <input type="checkbox" name="" id=""/>
    <input type="file" name="" id=""/>
    <input type="hidden" name=""/>
    <input type="image" src="" alt=""/>
    <input type="password" name="" id=""/>
    <input type="radio" name="" id=""/>
    <input type="reset" value=""/>
    <input type="submit" value=""/>
    <input type="text" name="" id=""/>
    <select name="" id=""><option value="">Option</option></select>
    <textarea name="" id="" cols="30" rows="10"></textarea>
    <button>Button</button>
</form> -->
<div id="box">111111111</div>
</body>
<script src="js/jquery-3.6.0.min.js"></script>
<script>
$(function(){
/*     console.log($('input').length);  //input节点
    console.log($(':input').length);
    $(':text').css('background','red'); */
    console.log($('#box')[0]);
    console.log($('#box').get(0));
    $('#box').get(0).style.background='red';
})
</script>
</html>